Everything I know about sprinklers, I've learned in the last 24 hours. I have a new house with an old system (12+ years?) with 20ish Rain Bird MaxiPaw 2045's. Half the heads won't rotate properly. Hunter PGP's seem like a good replacement. But I see something called PGP-ATR specifically to replace MaxiPaws. Is there a reason to pick PGP-ATR over PGP? Do they connect to the current piping differently? What really is the difference between the two? Thanks in advance!
